522 



Oz. Av. 



15. Supraspinatus, 



16. Infraspinatus, 



1 7. Biceps humeri, 



83-0 

 55-0 



21-5 



This muscle takes origin as usual ; but it is remarkable that the 

 tendon passing over the head of the humerus is much stronger" than the 

 muscle itself requires. I do not know the reason of this singular cir- 

 cumstance. 



Inserted, as usual, into the tubercle of the radius. 



18. BrachicBus extemus, 34-5 



Origin ; arises from the outside, backside, and part of the inside of 



the head of the humerus, winding outwards round the shaft of the bone, 

 to be inserted in the radius by a flat prolonged tendon, below and to the 

 inside of the tubercle of the radius. 



19. Triceps humeri, 224*0 



20. Flexor carpi radialis ? 8*75 



Origin ; from the inner side of the inner condyle of the humerus. 

 Insertion ; by a long tendon passing in a groove at the inner side of 



the wrist, then plunging deep into the palm, to be finally inserted, be- 

 low the short flexors, into the bases of the metacarpals of the inner and 

 middle fingers. 



21. Palmar is longus, „ . . 6-25 



Origin ; from the inner and back side of the olecranon. 



Insertion ; into the common junction of the palmar tendons at the 



bend of the wrist. 



22. Flexor carpi ulnaris, „ . . . 4*5 



Origin ; from the back of the inner condyle and olecranon. 

 Insertion ; into the carpal bone (pisiforme), articulating with the 



ulna. 



B. — A ligament connects this bone with the sesamoid bone, into 

 which the extensor carpi ulnaris is inserted, so as to cause both muscles 

 to flex and abduct the outer side of the hand. 



23. Flexor digitorum communis, . . . 19 - 5 



The superficial and deep flexors unite in a common tendon at the 



wrist, from which proceed three perforating and three perforate flexors. 

 At the same point of junction of tendons there are also found — 



1 . A tendinous ligament from the inner condyle, without any mus- 



cular fibres attached ; 



2. The tendon of a small muscle (24), which seems to be the flexor 



pollicis longus. 



24. Flexor pollicis longus ? 1*0 



Origin; from the radius and ulna, and interosseous septum. 



